44
SD Series Technical Manual
MDS 05-4846A01, Rev. H
any of the selections shown in Table 12. The table also lists
modem sensitivity ratings for the various modems. Note that
some modem choices are limited based on the model purchased.
1) For MDS x710-compatible operation.
2) 3200 bps not applicable to SD4.
3) Only available for SD2 and SD9 units with wide bandwidth hardware option.
Approximate sensitivity is -104 dBm for SD2 and -95 dBm for SD9.
4) SD1 sensitivity may be up to 2 dB less, due to MDS 1710 interoperability
constraints.
•
Transmit/Receive Frequency
—The receive and transmit frequencies
may be viewed or set here. If no frequencies have been entered,
the fields will be blank and the radio’s
PWR
LED will flash, indi-
cating that an entry is needed. Frequencies
must
be entered for the
radio to operate. Consult your station license to determine the
authorized frequencies for your system, and enter them exactly as
listed.
Table 12. Modem Selection vs. Speed, Bandwidth & Sensitivity
Modem Type
Selection
Over-the-air
Speed (bps)
B/W (kHz)
Approximate
Sensitivity
4
ETSI
Compliance
Modem 9600
1
9600
12.5
-112 dBm
Modem 4800
1
4800
12.5
-112 dBm
X
Modem 3200
1, 2
3200
5.00
-108 dBm
Modem 9600M
1
9600
12.5
-106 dBm
X
Modem 4800F
4800
6.25
-108 dBm
Modem 9600B
1
9600
12.5
-106 dBm
Modem 4800B
1
4800
12.5
-110 dBm
Modem BELL
1
1200
12.5
-110 dBm
Modem V23
1200
12.5
-110 dBm
Modem 19200N
19200
12.5
-100 dBm
Modem 19200E
19200
12.5
-96 dBm
X
Modem 9600N
9600
6.25
-98 dBm
Modem 19200
19200
25.0
-105 dBm
Modem 38400N
38400
25.0
-99 dBm
Modem 65000
3
65000
50.0
See note 3
Modem 19200M
19200
25.0
-106 dBm
X
Modem 38400E
38400
25.0
-97 dBm
X
